1909, Doughty, C.M. , The Cliffs and (1912) The Clouds 

Charles M. Doughty (1909) The Cliffs and (1912) The Clouds

His book-length poems are all fantastic in nature, and two of them are of some sf interest as perhaps the most arcane Future War tales ever told: The Cliffs (1909) features an airborne “Persanian” invasion of England, which is successfully repelled; in The Clouds (1912) a similar invasion is successful, and England occupied. Both poems are designed as warnings to complacent Britons, though it is hard to think that more than a few hundred readers ever came to terms with Doughty’s deeply eccentric though formidable style. [SFE]

Full text (The Clouds) at: http://babel.hathitrust.org/cgi/pt?id=uc2.ark:/13960/t71v5mv44;view=thumb;seq=1